Effect of partial interference on natural predation of a grassland grasshopper community from the Chihuahuan Desert.
Perturbation on natural predation in a driest year (1988) on eight grasshopper species assembly during an outbreak of one of them (Boopedon nubilum) in a toboso arid grassland in Chihuahuan Desert was analyzed. We used a four blocks trial with a treatment (predators’ decreased) and a control. Predat...
| Hoofdauteurs: | , |
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| Formaat: | Online |
| Taal: | spa |
| Gepubliceerd in: |
Instituto de Ecología, A.C.
2009
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| Online toegang: | https://azm.ojs.inecol.mx/index.php/azm/article/view/641 |
| _version_ | 1799770060728827904 |
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| author | Rivera García, Eduardo Cano-Santana, Zenón |
| author_facet | Rivera García, Eduardo Cano-Santana, Zenón |
| author_sort | Rivera García, Eduardo |
| collection | AZM |
| description | Perturbation on natural predation in a driest year (1988) on eight grasshopper species assembly during an outbreak of one of them (Boopedon nubilum) in a toboso arid grassland in Chihuahuan Desert was analyzed. We used a four blocks trial with a treatment (predators’ decreased) and a control. Predators recorded were five mammals, five reptiles, two amphibians, 20 birds, six diurnal Insects, six spiders and four nocturnal arthropods. The vertebrate predators presence (principally raptors) inhibited invertebrate predators action, the most important predators were birds. Results showed no significative effect of date and treatment on grasshopper density (pooled data). The effect of predation on the most abundant grasshopper species (B. nubilum) was observed, changing the species composition of the assembly and the use of plant stratification by grasshoppers. The graminicole species showed an escape strategy of jumping between grasses, tussocks, bunches or to bare soil, or only keep down into the grass, using this strategy, vulnerability (detection risk by predators) depends on their coloration and final position adopted to avoid predators. The short time effect results were due by short time response in treatment add to the predation satiation phenomena by over offer of meal in this specific patch by the outbreak grasshopper species. Where control and treatment showed clearly negative tendency on the population records of B. nubilum and a natural effect of predation, but our statistical analysis showed no significative differences, suggesting it is more adequate to do this kind of trials, considering a larger remotion of predators and monitoring and evaluating on next generation of grasshopper species. |
| format | Online |
| id | azm-article-641 |
| institution | Acta Zoológica Mexicana |
| language | spa |
| publishDate | 2009 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | azm-article-6412022-11-01T23:11:52Z Effect of partial interference on natural predation of a grassland grasshopper community from the Chihuahuan Desert. Efecto de la interferencia parcial en la depredación natural sobre una comunidad de acrídidos en un pastizal del Desierto Chihuahuense. Rivera García, Eduardo Cano-Santana, Zenón interference predation Chihuahuan Desert grasshopper community. interferencia depredación Desierto Chihuahuense comunidad de acrídidos chapulines Perturbation on natural predation in a driest year (1988) on eight grasshopper species assembly during an outbreak of one of them (Boopedon nubilum) in a toboso arid grassland in Chihuahuan Desert was analyzed. We used a four blocks trial with a treatment (predators’ decreased) and a control. Predators recorded were five mammals, five reptiles, two amphibians, 20 birds, six diurnal Insects, six spiders and four nocturnal arthropods. The vertebrate predators presence (principally raptors) inhibited invertebrate predators action, the most important predators were birds. Results showed no significative effect of date and treatment on grasshopper density (pooled data). The effect of predation on the most abundant grasshopper species (B. nubilum) was observed, changing the species composition of the assembly and the use of plant stratification by grasshoppers. The graminicole species showed an escape strategy of jumping between grasses, tussocks, bunches or to bare soil, or only keep down into the grass, using this strategy, vulnerability (detection risk by predators) depends on their coloration and final position adopted to avoid predators. The short time effect results were due by short time response in treatment add to the predation satiation phenomena by over offer of meal in this specific patch by the outbreak grasshopper species. Where control and treatment showed clearly negative tendency on the population records of B. nubilum and a natural effect of predation, but our statistical analysis showed no significative differences, suggesting it is more adequate to do this kind of trials, considering a larger remotion of predators and monitoring and evaluating on next generation of grasshopper species. Durante el verano de 1998, se analizó el efecto de interferencia parcial por medio de la remoción de depredadores, en una comunidad compuesta de ocho especies de acrídidos durante un brote masivo poblacional de una de ellas, Boopedon nubilum (Say), en una estepa subarbustiva de zacate toboso en el Desierto Chihuahuense. El diseño consistió de cuatro bloques con un tratamiento (depredadores disminuidos parcialmente) y un control. Las especies de depredadores registradas incluyeron a cinco mamíferos, cinco reptiles, dos anfibios, 20 aves, seis insectos diurnos, seis arañas y cuatro artrópodos depredadores de hábitos nocturnos. Los depredadores vertebrados importantes fueron las aves. La presencia de depredadores vertebrados inhibió la actividad de los depredadores invertebrados. No hay efecto significativo entre las fechas y tratamiento, sobre las densidades de acrídidos. El efecto de la depredación en la población de B. nubilum, modificó la composición de especies de la comunidad de acrídidos y las plantas usadas por los acrídidos para forrajeo y/o protección. Las especies graminícolas mostraron una estrategia de escape que incluye saltar entre los zacates, macollos o al suelo desnudo, disminuye el riesgo de captura, de acuerdo a su coloración y de la posición final que adoptan para evitar ser detectados. La ausencia de un efecto significativo de la depredación se atribuye al bajo impacto de la perturbación y al corto tiempo de respuesta, así como a un probable fenómeno de saciar su apetito por la abundancia de alimento debido al brote masivo de B. nubilum. Sin embargo se detectaron cambios en la composición de la comunidad de especies de acrídidos. Las parcelas de control y tratamiento mostraron una tendencia negativa sobre los registros de densidad de B. nubilum y un efecto natural de la depredación. Sugerimos que para este tipo de experimentos se deberá aplicar el disturbio durante un periodo de tiempo mayor y con una remoción total o casi total de los depredadores, así como monitorear las densidades de la siguiente generación de acrídidos, para poder determinar el efecto retardado de la depredación en la siguiente generación. Instituto de Ecología, A.C. 2009-08-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Original articles Artículos originales application/pdf https://azm.ojs.inecol.mx/index.php/azm/article/view/641 10.21829/azm.2009.252641 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 25 No. 2 (2009); 345-357 ACTA ZOOLÓGICA MEXICANA (N.S.); Vol. 25 Núm. 2 (2009); 345-357 2448-8445 0065-1737 spa https://azm.ojs.inecol.mx/index.php/azm/article/view/641/811 Derechos de autor 2009 ACTA ZOOLÓGICA MEXICANA (N.S.) http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spellingShingle | Rivera García, Eduardo Cano-Santana, Zenón Effect of partial interference on natural predation of a grassland grasshopper community from the Chihuahuan Desert. |
| title | Effect of partial interference on natural predation of a grassland grasshopper community from the Chihuahuan Desert. |
| title_full | Effect of partial interference on natural predation of a grassland grasshopper community from the Chihuahuan Desert. |
| title_fullStr | Effect of partial interference on natural predation of a grassland grasshopper community from the Chihuahuan Desert. |
| title_full_unstemmed | Effect of partial interference on natural predation of a grassland grasshopper community from the Chihuahuan Desert. |
| title_short | Effect of partial interference on natural predation of a grassland grasshopper community from the Chihuahuan Desert. |
| title_sort | effect of partial interference on natural predation of a grassland grasshopper community from the chihuahuan desert. |
| url | https://azm.ojs.inecol.mx/index.php/azm/article/view/641 |
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